package com.itheima.controller;

import com.itheima.pojo.Result;
import com.itheima.pojo.User;
import com.itheima.service.UserService;
import com.itheima.utils.JwtUtil;
import com.itheima.utils.Md5Util;
import com.itheima.utils.ThreadLocalUtil;
import jakarta.validation.constraints.Pattern;
import org.hibernate.validator.constraints.URL;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.util.StringUtils;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@RestController
@RequestMapping("/user")
@Validated
public class UserController {

    @Autowired //它可以对类成员变量、方法及构造函数进行标注，让 spring 完成 bean 自动装配的工作。
    private UserService userService;
    @Autowired
    private StringRedisTemplate stringRedisTemplate;
    @PostMapping("/register")
//    @PostMapping 注解是由 Spring Boot 提供的一个组合注解，它包含了 @RequestMapping 和 @ResponseBody 注解。
//    其中，@RequestMapping 注解用来声明请求的路径和请求方法，@ResponseBody 注解用来告诉 Spring Boot，返回值需要转换为 JSON 或 XML 格式。
    public Result register(@Pattern(regexp = "^\\S{5,16}$") String username,@Pattern(regexp = "^\\S{5,16}$") String password){
        //查询用户
       User u = userService.findByUserName(username);
       if(u==null){
           //没有占用
           //注册
           userService.register(username,password);
           return Result.success();

       }else{
           //占用
           return Result.error("用户名已被占用");
       }
    }

    @PostMapping("/login")
    public Result<String> login(@Pattern(regexp = "^\\S{5,16}$") String username,@Pattern(regexp = "^\\S{5,16}$") String password){ //data返回的是String类型的数据,即token
        //根据用户名查询用户
        User loginUser = userService.findByUserName(username);
        //判断用户是否存在
        if(loginUser==null){
            return Result.error("用户名错误");
        }
        //判断密码是否正确  loginUser对象中的password是密文
        if (Md5Util.getMD5String(password).equals(loginUser.getPassword())) { //对password进行加密，然后与数据库里的密文进行对比
            //登录成功
            Map<String, Object> claims = new HashMap<>();
            claims.put("id", loginUser.getId());
            claims.put("username", loginUser.getUsername());
            String token = JwtUtil.genToken(claims);
            //把token存储到redis中
            ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
            operations.set(token,token,1, TimeUnit.HOURS);
            return Result.success(token);
        }
        return Result.error("密码错误");

    }

    @GetMapping("/userInfo")
    public Result<User> userInfo(@RequestHeader(name = "Authorization") String token){
//        Map<String, Object> map = JwtUtil.parseToken(token);
        //System.out.println(map); 打印格式：{id=2, username=wangba}
        Map<String, Object> map = ThreadLocalUtil.get();
        //map.get("username");
        String username = (String) map.get("username");

        User user = userService.findByUserName((username));
        return Result.success(user);
    }

    @PutMapping("/update")
    public Result update(@RequestBody @Validated User user){ //只有加上Validated注解，user类里的校验才生效
        userService.update(user);
        return Result.success();
    }

    @PatchMapping("/updateAvatar")
    public Result updateAvatar(@RequestParam @URL String avatarUrl) {
        userService.updateAvatar(avatarUrl);
        return Result.success();
    }

    @PatchMapping("/updatePwd")
    public Result updatePwd(@RequestBody Map<String,String> params,@RequestHeader("Authorization") String token) {
        //校验参数
        String oldPwd = params.get("old_pwd");
        String newPwd = params.get("new_pwd");
        String rePwd = params.get("re_pwd");

        if(!StringUtils.hasLength(oldPwd) || !StringUtils.hasLength(newPwd) || !StringUtils.hasLength(rePwd)) {
            return Result.error("缺少必要的参数");
        }

        //原密码是否正确
        //调用userService根据用户名拿到原密码,再和old_pwd比对
        Map<String,Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User loginUser = userService.findByUserName(username);
        if (!loginUser.getPassword().equals(Md5Util.getMD5String(oldPwd))){
            return Result.error("原密码填写不正确");
        }

        //newPwd和rePwd是否一样
        if (!rePwd.equals(newPwd)){
            return Result.error("两次填写的新密码不一样");
        }

        //2.调用service完成密码更新
        userService.updatePwd(newPwd);
        //删除redis中的token
        ValueOperations<String,String> operations = stringRedisTemplate.opsForValue();
        operations.getOperations().delete(token);
        return Result.success();
    }
}
